If I go ahead and press 'Commit', it fails with the message:
Subcommand 'commit' doesn't accept option '--diff-cmd arg'
Somehow, on your system, the command line argument "--diff-cmd" to the CommitWindow is being interpreted as a filename. I'm baffled as to how this could happen.
A workaround would be to uncheck the --diff-cmd and 'svn' items in the list. Anyone else see this problem?
Chris